Hi!
We also came across this bug. Turns out the Python bindings do not correctly
check if a session could be established and keep using a NULL pointer in that
case.
The following patch prevents the segfault in Frank's example program and raises
an ordinary Exception instead:
--- ./net-snmp-5.4.3~dfsg/python/netsnmp/client.py 2009-04-23
16:21:53.000000000 +0000
+++ /usr/share/pyshared/netsnmp/client.py 2012-06-28 12:19:49.170930128
+0000
@@ -143,6 +143,8 @@
sess_args['PrivPass'],
sess_args['Engineboots'],
sess_args['Enginetime'])
+ if self.sess_ptr == 0:
+ raise Exception("Could not open session")
else:
self.sess_ptr = client_intf.session(
sess_args['Version'],
@@ -151,6 +153,8 @@
sess_args['LocalPort'],
sess_args['Retries'],
sess_args['Timeout'])
+ if self.sess_ptr == 0:
+ raise Exception("Could not open session")
def get(self, varlist):
res = client_intf.get(self, varlist)
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